SB20260727195 - Use-after-free in Linux kernel cpufreq driver
Published: July 27, 2026
Security Bulletin ID
SB20260727195
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-64372)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to use-after-free in pcc_cpufreq_do_osc() when performing two-phase _OSC negotiation through acpi_evaluate_object(). A local attacker can trigger the vulnerable code path to cause a denial of service.
The issue also involves a double free after the stale pointer is freed again.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0e3c739a2f6fc1de5b19a8839ab80696b9cb2a29
- https://git.kernel.org/stable/c/266d3dd8b757b48a576e90f018b51f7b7563cc32
- https://git.kernel.org/stable/c/5cdb25f144b101083d8bf3fd023ad87fbe6850d7
- https://git.kernel.org/stable/c/632666a63116d8061c62a988d1ca39dcd6d27c9b
- https://git.kernel.org/stable/c/6ba6f6783be2ffeb2cbcdc9321c4b9f708f796f7
- https://git.kernel.org/stable/c/8e454e9d0bc03446d610ee49abec9dfd424f6541
- https://git.kernel.org/stable/c/982c9f92d57bda2b769851ff6d90d43dcf5f3734
- https://git.kernel.org/stable/c/a36ca93a8ba57464e521d70a337d37f069064111